Influence analysis of symmetry on capsule in six-cylinder-port hohlraum

• 来源期刊: 中国物理B（英文版）
• 关键词: inertial confinement fusion (ICF) six-cylinder-port hohlraum flux symmetry three-dimensional view factor model
• 年，卷（期）: 2019,（3）
• 页码范围: 266-271
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/3/035203

摘要

We have investigated the flux symmetry on the capsule in a six-cylinder-port hohlraum for improving the design of the hohlraum.The influence factors of drive symmetry on the capsule in the hohlraum are studied,including laser power,laser beams arrangement,hohlraum geometric parameters,plasma condition,capsule convergence,etc.The x-ray radiation flux distribution on the capsule is obtained based on the three-dimensional view factor model.In the six-cylinder-port hohlraum,the main drive asymmetry is the C40 mode asymmetry.When the C40 mode asymmetry approaches zero,the drive symmetry on the capsule is optimal.Our results demonstrate that in order to have a high flux symmetry on the capsule in the laser main-pulse stage,more negative initial C40 modes are needed,which can be realized by adjusting the hohlraum geometry parameters.The hohlraum with column length LH =4.81 mm has an optimal symmetry in the laser main-pulse stage.